The U.S. Geological Survey (USGS) reports that the rate of earthquakes in Oklahoma has increased by about 50 percent since October 2013, indicating increased probability that a damaging quake will strike central Oklahoma.
Prior to the quake, geoscientists had placed GPS markers in and around the San Francisco area. Immediately after the quake, researchers converged on the area to collect and compare the pre- and post-quake GPS data, which revealed the direction and speed of surface movements, allowing scientists to infer the pattern of slip on the fault plane that had ruptured far underground.
On a muggy day in mid-July 2009, a lone seven-story condominium complex northwest of Kobe, Japan, was violently shaken by an earthquake. Onlookers watched the 23-unit, wood-frame tower sway and bounce while, inside the building, furniture toppled and plates clattered to the floor. No one was hurt during the highly localized event and there was only minimal damage, in part because the building’s wooden skeleton had been augmented to better resist earthquake shaking, but also because the whole event — from the seismicity to the partially furnished building — was just a test.
Witnessess Kathryn D. Sullivan
Assistant Secretary of Commerce for Environmental Observation and Prediction, National Oceanic and Atmospheric Administration, U.S. Department of Commerce James Rivera
Deputy Associate Administrator, Office of Disaster Assistance, U.S. Small Business Administration David C. Trimble
Witnesses John Anderson
Seismological Society of America John Ebel
Director, Weston Observatory, Boston College Mike Pool
Deputy Director, Bureau of Reclamation Accompanied by
Associate Director of Natural Hazards, United States Geological Survey
Witnesses: Murray Hitzman
Chairman, Committee on Induced Seismicity Potential in Energy Technologies, National Research Council
Professor of Economic Geology, Colorado School of Mines Bill Leith
Senior Science Advisor for Earthquake & Geologic Hazards, U.S. Geological Survey Susan Petty
Witnesses: Roger Pulwarty
Director, National Integrated Drought Information System, National Oceanic and Atmospheric Association J.D. Strong
Executive Director, Oklahoma Water Resources Board James Famiglietti
Professor and Director, Earth Systems Science, University of California-Irvine